101212101212221 has 4 divisors (see below), whose sum is σ = 101215545352992. Its totient is φ = 101208657071452.

The previous prime is 101212101212213. The next prime is 101212101212291. The reversal of 101212101212221 is 122212101212101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101212101212221 - 2³ = 101212101212213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101212101212291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722026305 + ... + 1722085078.

It is an arithmetic number, because the mean of its divisors is an integer number (25303886338248).

Almost surely, 2^{101212101212221} is an apocalyptic number.

It is an amenable number.

101212101212221 is a deficient number, since it is larger than the sum of its proper divisors (3444140771).

101212101212221 is an equidigital number, since it uses as much as digits as its factorization.

101212101212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3444140770.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 101212101212221 its reverse (122212101212101), we get a palindrome (223424202424322).

The spelling of 101212101212221 in words is "one hundred one trillion, two hundred twelve billion, one hundred one million, two hundred twelve thousand, two hundred twenty-one".